Improved apparatus for concentrating extract of tan-bark



- following is a full description of the same.

' sults obtained, I believe the above proportions the best @tutti (tttite.

wweeeaeew -www a A BENJAMIN IRVING, or NEW YORK, AssieNon rro ti. A. TA

0F MALONE,

NEW YORK.

(lated December 22, 1868.

IMPRovED APPARATUS FOR concern-RATING BXTRAc-r or' TAN-BARI;

The Schedule referred to in these Letters Patent and making part of the same.

To all whom t may eoncm'nA Be it known that I, BENJAMIN IRVING, of the city, county, and State of New York, have invented certain new and useful Improvements in Apparatus for Concentrating the Liquid Extract of Bark for Tanning, and other purposes; and I do hereby declare that the In my invention for a like purpose, patented April 30, 1867, No. 64,324, I describe constructing a tlat wonn, with corrugated plates, in combination with steam-chambers and air-tight receiving-tanks.

My present invention, having' changed the mode of constructing the worm, and modicd the arrangement' of it with regard to the vsteam-chamber and air-tight receiving-tanks, is intended to be an improvement on my said patent, No. 64,324; and

The nature of the said improvements or invention consists- First, in constructing an evaporating-pan, with a continuously-descending channel from end to end of its surface, in combination with a steam or hot-air chamber, underneath the pan, for the purpose of evaporating the water from the thin stream of liquid extract as it flows down the channelsof the pan.

Second, in constructing the evaporating-box with a roof, secured by hinges to the sides of the box, so that an opening at the peak may be made at pleasure, by separating the sides ofthe roof, to promote the escape of the watery vapor ascending from the liquid extract on the pan, and, at the saine time, facilitate access to the pan, to clean it when required.

Third, in combining, with the evaporating-pan and box, as aforesaid, a water-spiinkler or condenser, for condensing the steam or watery vapor rising from the liquid extract when vthe roof of the box is closed, or the watery vapor is not otherwise carried oli" fast enough for rapidly evaporating the liquid extract.

But, to desciibe my. invention more particularly, I will referto the accompanying drawings, forming a part of this specification, the same letters of reierenee, wl rereever they occur, referring to like parts. v

Figure l is a side view of the evaporating-box or apparatus.

Figure 2 is a plan view of the same, on the line :v av, iigI 1, showing the channel-formed evaporating-pan.

Iligure 3 is an end View of the same, through the line az x2, iig. 2. Y

Letter A is a wood or metal box, of some ten feet long by two feet wide, and fifteen inches deep. 'lhese precise measurements are not absolutely necessary, as any other proportions may be made to answer the purpose, though, for convenience of construction and rethat can be used; A

In this boxis secured, by .means ofsnles or flanges, B, a channel-formed` metal evaporating.pan, C, so as to subdivide the box longitudinally into two compartments, and E, the lower one being a steam-tight chamber, and the upper one `an evapora-ting-chamber. The construction of the evapora-tilig-pan is by 'ioin ing together, side by side, lengthways, (iu a full-size apparatus,) iifteen tint-bottomed troughs or half-circular tubes, with a descent from end to end of the pan,v'

(say about ten feet long,) in each channel, of about one-quarter of an inch. By this construction of the pan, it will readily be seen that a constant stream of liquid extract can'be discharged upon the pan by the pipe F, and, following the direction of the arrows, iig.

2, will have to pass over about one hundred and fifty' feet of evaporatiiig-suriice before it reaches the outletpipe G. And as the pipe lx is not intended to be over about half an inch bore, the quantity of liquid extract on the pan will be but a thin sheet, and thus be raps f idly heated by a low degree .of heat applied to the undcr side ofthe pan, and-the watery particles of the eX- tract vaporized before itcan pipe G.

Io admit of the rapid escape 'of the vapor eliminated from the extract, the roof of the box is formed, by means of two doors or wings, II, hinged to theuppcr edges ofthe sides of the evaporating-box, and so arranged that, when closed, they form a peaked roof.

escape by the outlet-v The object of this arrangement is that, when necessary Y to promote the escape of the vapor rising from the liquid extract, the wings may be opened more or less space, to form a draught, as it were, to carry off the vapor; also, when necessary to inspect or clean the pan, the whole top of the box can b'e tlnown open at once.

In conjunction with the arrangement of the roof of the evapora'ting-box, to condense the vapor rising from the liquid extract, is used a water-sprinkler condensingapparatus, J, having a communication with the vaporchamber by means of an eXhaust-pipe,`K. By this device a jet of cold water will beldischarged from the sprinkler L, which, descending past thc outlet ofthe pipe K, will condense the vapor in contact with it, and thus, by a partial vacuum being created, draw oft' the vapor as fast as it rises in the evaporating-box.

It will be obvious that any exhausting-apparatus will answer the same purpose, and therefore I do not intend to limit myself to the use of a jet of water, where other exhaustiug-apparatus would be equally convenient to use. l

LetterM. is the steam-induction pipe, and

N, the waste or condensedhwater-escape pipe.

Letter P are legs, upon which thc apparatus is sup. ported, or represent any other frame-Work on which it may be adjusted. c

Having now described my invention, I will proceed to set forth what I claim, and desire to secure by Letters Patent of the United States. I claim the combina-tion of the made substantially as hcreinbefore described. with the atten,-

comp-ailments,

Dwmd E, of the evaporaitng-box A, for the purpose of concentrating the liquid extract of` bark for calming-purposes, substantially as horeinbefore set forth.

also claim the combination of the hinged wings H with the evaporzitng-box A, substantially as de scribed, and for the1 purposes set forth. Y

I also claim, in combination with the evapora-tingchamber E, :L condenser, J, or other equivalent device,` ubst-:mtiniiyns described, and for the purposes set orth.

BENJAMIN IRVNG.

Witnesses:

' CHARLES L. BARRITT, FRANKmxBARRITT. 

